ubuntu-app-platform updated to Qt 5.6.2

[Timo Jyrinki]

Hi,

ubuntu-app-platform #26 has Qt 5.6.2 (up from 5.6.1), including around
5 months of upstream LTS bugfixes. It passed QA and everything seems
to work normally, but you might find some pet bug to be fixed. Since
this is the first point release update done in ubuntu-app-platform I
thought to do an announcement.

To recap, the platform snap is mostly to be used by apps that target
Ubuntu Personal and require a shared Qt with backported patches and
other libraries.

For most Qt applications snappers, either simply staging from archives
or using the Qt 5.7 / 5.8 cloud parts offering pure upstream Qt are
probably more interesting. See the blog post at
https://developer.ubuntu.com/en/blog/2016/11/16/snapping-qt-apps/ for
more information.

Qt 5.6.3 should follow in 6 months or so.

-Timo